Assig-nor to crane



MARTIN H. CRANE, 0F CINCINNATI, CHIC, ASS-IGNOR TQ CRANE, BREED St CO., CF THE SAME PLACE. i

Letters Pate-nt No. 70,811, dated November 12, 1867.

IMPROVEMENT IN THE CONSTRUCTION OF SHEET-METAL BOXES.

To WHOM 1T MAY co'NcERN:

Be it known that I, MARTIN H. CRANE, of Cincinnati, Hamilton cohnty, Ohio, have invented a new and useful improvement in the Manufacture of Sheet-Metal Vessels and Cases, Sie.; and -I hereby decl-'1re the following to be a. full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this speciiication.

My invention consists in an improved mode of manufacturing various articles of sheet metal, such as bathingtubs, trunks,.sinks,' 36e., whereby great strength and lightness and elegance of finish are obtained."

Figure 1 isa partially-sectionized perspective view of a. box or case embodyingvmy invention.

Figure'Zis a. lid or cover` for the same. v

Figure S'Ishows a.' portion of one of the composite ribs o'r mould-ings, previous to its application v.to vthe case.v

The body A of the box or the body B of' the lid may be formed in any approvedl way. In order to stiffer; the same, and impart a. pleasing finishl with very slight increase of weight, I braze or solder to either the exterior surface, as at C and D, or tothe interior surface, as at E, vribs or mouldings composed of strips F, of pine or other Wood, tightly enveloped in sheet-metal casings G. These ribs or mouldings are constructed bv drawing through a. suitable die strips of wood of the proper form, and their metallic envelopes, so as to bind the two substances rmly together, and make of them in eifect a single piece. then attached by soldering or brazing so as 'to form a stiening-rib, flange,

I claim-herein as new, and of my invention- The mode of sti'ening and ornamentingr vessels made of sheet metal ings, of wood and metal, soldered to the exterior or interior surface of t l Intestimonyof which invention I hereunto set my hand.

The composite strip thus formed is or moulding, as above stated.

he vessel, substantially as set forth.

Witnesses:

GEO. H. KNIGHT, JAMES H. LAYMAN.

M. H. CRANE.

by the use of composite ribs or mould` 

